*************************************************************** From: Sverre Planke <planke@xxxxxxx> *************************************************************** We would like to encourage your participation in the following session at the 2008 International Geological Congress in Oslo, Norway (August 6th – 14th). MPI-05 Large Igneous Provinces: Initiation, evolution and origin The events during initiation of some mafic Large Igneous Provinces (North Atlantic, Ferrar, and Karoo Igneous Province) were studied recently, with spectacular results and new concepts. In all cases we see that early emplacement occurred as sills in a shallow crustal environment with abundant magma-wet sediment interaction and diatreme formation. However, this initial character may be due to the local geology of young unconsolidated sediments overlying crystalline basement. We can neither identify an initial phase of small volume magma emplacement, nor a regular early involvement of molten continental crust. In the Ferrar Province, we recognize that the magmas belong to the tholeiitic differentiation series with the early intrusive andesitic magmas being more evolved than the later plateau forming basaltic andesitic lavas. Which of these observations are of general relevance for LIP formation and are crucial pieces in the big puzzle ? How are Silicic Large Igneous Provinces initiated, do they start with a mafic initial phase ? We invite any geoscientist working on the topic of initiation of mafic or silicic LIP to present his/her new data from other LIPs on earth in order to gain a more precise understanding of the early processes during production, evolution and emplacement of such catastrophic volumes of magma. Conveners: Lothar Viereck-Goette, Sverre Planke Abstract submission deadline: February 29th 2008 ============================================================== To unsubscribe from the volcano list, send the message: signoff volcano to: listserv@xxxxxxx, or write to: volcano-request@xxxxxxxx To contribute to the volcano list, send your message to: volcano@xxxxxxxx Please do not send attachments. ==============================================================
